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Finding the Fourth Proportional to 1,452.15, 2,178.21 and 478.32

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Solution

The fourth proportional to 1,452.15, 2,178.21 and 478.32 is: 717.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,452.15 : 2,178.21 = 478.32 : x
  2. Step 2: Convert to fraction form
    1,452.15/2,178.21 = 478.32/x
  3. Step 3: Cross multiply
    1,452.15x = 2,178.21 × 478.32
  4. Step 4: Simplify right side
    1,452.15x = 1,041,881.41
  5. Step 5: Solve for x
    x = 1,041,881.41/1,452.15
  6. Step 6: Final answer
    x = 717.48

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.